Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
  • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
  • G01R31/34—Testing dynamo-electric machines
  • G01R31/343—Testing dynamo-electric machines in operation

Definitions

• the invention relates to a device for checking an electric drive and / or a mechanical device assigned to the drive, which is, in particular, a fitting or an actuator, wherein the drive and / or the mechanical device is assigned a structural unit which has connections, and wherein a diagnostic module can be connected to the connections.
• a device for checking an electrical drive or a mechanical device connected to it which can be a fitting or an actuator, is necessary in order to be able to monitor the functional state of the drive and / or the actuator. Constant monitoring enables malfunctions or changes in the operating behavior of the drive and / or the mechanical device to be detected in good time.
• the mechanical device is a valve or an actuator, e.g. Can be part of a power plant, changes and / or damage that do not yet affect the reliability of the valve or actuator, but can result in safety-related damage or malfunctions, can be recognized at an early stage.
• a defective or malfunctioning drive and / or a defective or malfunctioning mechanical device can consequently be identified at an early stage and then serviced, repaired or replaced. The same applies in the event that the electric drive is assigned to an actuator in a track system, which can in particular be the actuator of a railway switch.
• EP 0 609 261 B1 describes a device for checking an electric drive, which in particular includes a drive.
• ner armature is known.
• the drive is assigned a structural unit in which voltage measurement lines start from supply lines of the drive and end at voltage taps on the structural unit.
• current transformers are assigned to the supply lines in the unit, which are connected to current taps on the unit via current measuring lines.
• the current transformers are generally assigned to the supply lines, for example inductively, without interrupting these supply lines.
• a diagnostic module can be connected to the connections of the assembly.
• This diagnostic module is a diagnostic connector in the known, which is connected to a central measuring and evaluation unit. The diagnostic connector picks up signals at the connections and sends them to the measuring and evaluation unit via a line.
• DE 39 36 988 C2 discloses a diagnostic module designed as a plug, which contains a signal processing arrangement. Since the monitoring of a drive must be seamless, this arrangement must always be connected to a supply voltage source. Since no suitable auxiliary power is available in the area of a drive to be monitored, the diagnostic module must either be supplied from the outside via a complex line or be provided with a relatively large battery. Therefore, it was not economically viable to design a diagnostic module without a permanent connection to a central measuring and evaluation unit.
• the invention has for its object to provide a device for checking an electric drive or actuator and / or a mechanical device associated with the drive, the device comprising a diagnostic module that does not have to be connected to a central evaluation unit during the check and above only a relatively small supply power or a relatively small facility for energy supply is required.
• an energy supply device for the diagnostic module is present which can be activated via at least one of the connections on the module or via an external signal.
• the module is in an energy-saving sleep mode when there are signals. If one or more signals are present, the module switches to work mode. It is therefore advantageous to use little energy in the diagnostic module, even if no central measuring and evaluation unit is provided for one or more diagnostic modules.
• a small electrical energy storage device is sufficient for the diagnostic module's own use, e.g. a battery, or a small supply line with a small cross-section.
• diagnostic module can be used on units of different drives in time and location in succession, without the need for hindering line connections, in particular data lines, from the diagnostic module. This makes it quick and easy to check electrical drives at different locations.
• the diagnostic module is, for example, an electrical energy store and / or an energy supply device
• the electrical energy store can be rechargeable or not rechargeable. It can also be an electrical capacitance. As a result of Such an energy supply is sufficient for the diagnostic module's own use in sleep mode.
• the energy supply device can be switched on, for example, via a signal of the operating voltage and / or the operating current and / or the control voltage and / or by another signal that is present at at least one connection of the structural unit. Only when e.g. the operating voltage and / or the control voltage is applied to the drive, the diagnostic module is activated. As long as the drive is at rest, the diagnostic module is also in sleep mode. Since the electric drive, e.g. is assigned to a mechanical device, is only switched on when the mechanical device is to be moved, the diagnostic module advantageously remains in sleep mode for a very long time.
• a switch arranged in the supply line of the diagnostic module can be switched via a signal of the operating voltage, the operating current and / or the control voltage of the drive and / or by another signal present at the connection
• the diagnostic module contains, for example, an evaluation unit (processor).
• an evaluation unit processor
• a line connection to a central evaluation unit is then not required or you can get by with a poorly performing line, because a large part of the evaluations is already carried out in the diagnostic module.
• the energy supply of such an evaluation unit in the diagnostic module is ensured with a small device, for example a battery, or a small supply line, because the diagnostic module is advantageously kept in sleep mode while the drive is in the stationary state.
• the diagnostic module is, for example, calibratable and has a calibration input and / or a calibration output, which e.g. are connected to the evaluation unit. At any signal inputs, e.g. at the calibration input, known values can be fed in, after which actual values are output at the calibration output.
• the transfer function (calibration curve) of the diagnostic module is generally determined outside the diagnostic module.
• This transfer function is implemented in the diagnostic module, e.g. stored in the evaluation unit after e.g. via the calibration input. This allows you to infer suitable values for assessing the drive or the mechanical device.
• a data memory can be present in the diagnostic module, e.g. is connected to the evaluation unit. Measured or calculated data can be stored there until the diagnostic module is connected to an external evaluation unit at a later time for reading out and further processing the data.
• a setpoint memory that contains setpoints can be connected to the evaluation unit in the diagnostic module. If it is determined in the evaluation unit that measured or calculated If the values exceed or fall below a target value, a signal identifying the drive or the associated mechanical device can be emitted.
• one or more signaling devices e.g. LEDs connected to indicate that data is available or stored.
• the diagnostic module has the shape of a plug, for example, and the connections on the structural unit are taps for receiving the plug. This has the advantage that the diagnostic module can be easily and quickly moved from one unit to another, so that several drives and / or associated mechanical devices can be checked in a short time.
• the diagnostic module can be a plug-in board, which can also be easily changed from one unit to another.
• the diagnostic module can also be permanently installed, it being necessary to assign such a diagnostic module to each structural unit.
• the diagnostic module can be a mobile module, which can be easily changed over and which, by means of suitable devices, can have several drives or mechanical devices, e.g. in the common strand of the energy supply.
• the diagnostic module contains a reading device that is connected to a coding input that can be connected to a coding connection of the structural unit.
• a coding connection of the assembly there is coding information which identifies the drive to be checked or the mechanical device.
• the advantage is achieved in particular that a diagnostic module requires so little energy that in particular an evaluation unit and / or also a memory is accommodated in the diagnostic module and supplied with energy can be, and that the diagnostic module is still so light and compact that it can be used in succession on different units.
• a device according to the invention for checking an electric drive and / or an associated mechanical device is explained in more detail with reference to the drawing. Such a device is shown schematically there.
• the drawing shows a structural unit 1 with connections Cl to Cn for coding signals, connections Ll to L3 for voltage signals, connections II to 13 for current signals and connections UI to Un for the operating or control voltage of a drive 15 to be checked.
• the voltage signals go in the unit 1 directly from supply lines la of the drive 15.
• the connections II to 13 for current signals are in the unit 1 the supply lines la, e.g. inductive, assigned.
• the drive 15 drives a mechanical device, which can be a valve or an actuator.
• a diagnostic module 2 is connected to the structural unit 1 and can be designed as a plug. There are the connections C, U, L, I formed on the assembly 1, for example as taps for receiving contacts of the plug.
• the diagnostic module 2 can also be permanently mounted or mounted separately.
• the connections L1 to L3 for voltage signals are connected via a module 3a for electrical isolation to a signal conditioner 4.
• the connections II to 13 for current signals are connected directly and / or via the same or a different module 3b for electrical isolation to the signal conditioner 4. On the output side, this is connected to an evaluation unit 6 via an analog-digital converter 5.
• connections C1 to Cn for coding signals are also connected to the evaluation unit 6 via a reading device 14.
• a reading device 14 To store data processed in the evaluation unit 6, the latter is connected on the output side to a data memory 7.
• the evaluation unit 6 can be connected to a target value memory 8 in order to be able to compare calculated values with a target value.
• the evaluation unit 6 is also connected to a calibration input 9a and to a calibration output 9b.
• a calibration input 9a or another input for example from the setpoint memory 8
• actual values and a calibration curve are obtained from the calibration output 9b.
• This or a known calibration curve can be fed into the evaluation unit 6 from the outside at the calibration input 9a.
• Signaling devices 10a, 10b for example light-emitting diodes, can be connected to the evaluation unit 6 and / or the data memory 7, which indicate whether data is available. Notification devices 10a, 10b can also be used for other purposes.
• Data output lines 11, 12 with connections can originate from the evaluation unit 6 or from the memory 7. which can be used to deliver data to a central evaluation unit (not shown).
• the diagnostic module 2 To supply energy to the diagnostic module 2 itself, it contains, for example, an electrical energy store 13, from which a system of supply lines 16 starts, which supplies components (energy consumers) of the diagnostic module 2.
• the supply lines 16 can also be led into the diagnostic module 2 from an external voltage source.
• the subsequent change in the voltage signals and / or the current signals and / or the operating or control voltage connects the electrical energy store 13 or the external voltage source to the energy consumers in the diagnostic module 2.
• the energy consumers of the diagnostic module 2 are in sleep mode, so that a small energy store 13 and / or a small voltage source and small supply lines 16 are sufficient. This is the only way to enable the diagnostic module 2 to be constructed with an integrated evaluation unit 6, so that it can easily be used in succession on different structural units 1.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Testing Electric Properties And Detecting Electric Faults (AREA)
• Control Of Electric Motors In General (AREA)
• Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7848316

Family Applications (1)

Country Status (13)

Families Citing this family (8)

Citations (4)

Family Cites Families (9)

• 1997
  • 1997-11-11 DE DE19749842A patent/DE19749842A1/de not_active Ceased
• 1998
  • 1998-09-29 TW TW087116173A patent/TW407211B/zh not_active IP Right Cessation
  • 1998-10-29 CA CA002309678A patent/CA2309678C/en not_active Expired - Fee Related
  • 1998-10-29 BR BRPI9814132-5A patent/BR9814132B1/pt not_active IP Right Cessation
  • 1998-10-29 DE DE59804604T patent/DE59804604D1/de not_active Expired - Lifetime
  • 1998-10-29 ES ES98959774T patent/ES2178855T3/es not_active Expired - Lifetime
  • 1998-10-29 CZ CZ20001697A patent/CZ299694B6/cs not_active IP Right Cessation
  • 1998-10-29 HU HU0004753A patent/HU222935B1/hu not_active IP Right Cessation
  • 1998-10-29 WO PCT/DE1998/003170 patent/WO1999024840A1/de not_active Ceased
  • 1998-10-29 RU RU2000115297/09A patent/RU2229142C2/ru not_active IP Right Cessation
  • 1998-10-29 UA UA2000052645A patent/UA46164C2/uk unknown
  • 1998-10-29 EP EP98959774A patent/EP1031041B1/de not_active Expired - Lifetime
  • 1998-10-29 JP JP2000519792A patent/JP3525178B2/ja not_active Expired - Fee Related
• 2000
  • 2000-05-11 US US09/568,939 patent/US6362744B1/en not_active Expired - Lifetime

Patent Citations (4)

Non-Patent Citations (1)

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